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Sewage treatment plant, Union, Oregon. NPDES permit OR0029939, in force until Apr 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Jun, Oct |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun, Oct |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | Oct |
| Temperature, water deg. centigrade | monthly maximum | report only (deg C) | Jan, Feb, Mar, Apr, May, Jun, Nov, Dec |
| Temperature, water deg. centigrade | maximum 7-day average | report only (deg C) | Jun, Oct |
| Temperature, water deg. centigrade | maximum 7-day average | report only (deg C) | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Flow rate | maximum daily average | report only (cfs) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 91 lb/d | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 180 lb/d | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 140 lb/d | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| pH | daily minimum | ≥ 6 SU | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| pH | daily maximum | ≤ 9 SU | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| pH | monthly minimum | report only (SU) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| pH | monthly maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| pH | monthly maximum | report only (SU) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Alkalinity, total [as CaCO3] | monthly maximum | report only (mg/L) | Jan, Mar, Apr, Nov |
| Alkalinity, total [as CaCO3] | monthly maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Solids, total suspended | monthly average | ≤ 91 lb/d | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Solids, total suspended | daily maximum | ≤ 180 lb/d | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Solids, total suspended | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Solids, total suspended | weekly average | ≤ 140 lb/d | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly maximum | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 0 MGD | Jul–Sep |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jan, Feb, Mar, Apr, May, Nov, Dec |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Jun |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Jun |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 0 MGD | Jun |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Oct |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Oct |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 0 MGD | Oct |
| Chlorine, total residual | monthly average | ≤ .03 mg/L | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Chlorine, total residual | daily maximum | ≤ .07 mg/L | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| E. coli | daily maximum | ≤ 406 #/100mL | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| E. coli | monthly geometric mean | ≤ 126 #/100mL | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| E. coli | daily maximum | report only (#/100mL) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Excess thermal load | maximum 7-day average | ≤ 3 mkcal/day | Jun, Oct |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| Chlorine usage | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
Cited limits by parameter: Oregon's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/OR0029939 · MCP: https://passage-data.com/mcp